SOLUTION: I need help solving the equation below:
a-4b=11
5a-7b=-10
I know the solution is -9, -5 but can you please show me the steps to get that answer?
Algebra ->
Expressions-with-variables
-> SOLUTION: I need help solving the equation below:
a-4b=11
5a-7b=-10
I know the solution is -9, -5 but can you please show me the steps to get that answer?
Log On
Question 727117: I need help solving the equation below:
a-4b=11
5a-7b=-10
I know the solution is -9, -5 but can you please show me the steps to get that answer? Answer by checkley79(3341) (Show Source):
You can put this solution on YOUR website! a-4b=11 multiply by -5 & ad.
5a-7b=-10
-5a+20b=-55
----------------
13b=-65
b=-65/13
b=-5 ans.
a-4(-5)=11
a+20=11
a=11-20
a=-9 ans.
Proof:
5(-9)-7(-5)=-10
-45+35=-10
-10=-10
(